Power-driven hammer.



A. HUNTER. POWER omvw HAMMER.

APPLICATION FILED APR. 4. I917.

1,25 1,66'?. 7 Patentfi Jan. 1, .1918.

2 SHEETS-SHEET I.

A. HUNTER.

. POWER DRIVEN HAMMER. APPLICATION FILED APR. 4. i917- Patented Jan. 1, 1918.

2 SHEETSSHEET 2- ALBERT. HUNTER, OE SPOKANE, WASHINGTON.

POWER-DRIVEN HAMMER.

Specification of Letters Patent.

Patented. Jan. 1, 1918.

Application filedtApril 4, 1917. Serial No. 159,827.

To. all-whom it"may. concern."

Be it" known that I, ALBERT HUNTER, a citizen of the, United States, residing at Spokane,in the county of Spokane an'dState of Washington, have invented certain'new andnsefnl Improvements in Power-Driven Hammers, .of; which; the. followingis a specification. A v

My invention relates to improvements; 1n

power driven hammers, and the object:

thereof is the provision ofa novel, highly eflicient, comparatively slmple, and easily operated mechanism which. iswell adapted for the; heavier work: generally accomplished with hand sledges, such,,for'instance, as the driving of wedges, for wood splitting, of

rock drills and thelike employed in mining, logging, and numerouspther industries.

In carrying out my invention 1 have -provided an apparatus which may be readily transported from place to place. in the. course of the-days work. I have also provided in the construction adjusting" means by which the. striking element; may be conveniently brought into proper relation with the object to be'operated upon.

Generally speaking, the organization :comprises a hammer or sledge adapted to have a pivotalvswinging-action, a toothedand friction. faced rotatable supporting wheel towhich the-hammer is secured, a shiftable shaft upon which the. wheel, is rotatably mounted, a power driven friction wheel adapted to engaged the. hammer supporting wheel totprovide the striking movement, a toothed wheel adapted to, engage the hame mer supporting wheel. for retractive movementofthe hammer, andbot-h automatic and manually controlled. actuating means for effectingalternate movement of the hammer.

The various features of construction, com-- bination, arrangement, and detailsof the. several elements willbe hereinafter fully; pointed 7 out, and; described, recourse being had to the. accompanying drawings, in

which Eigure llsis a. side -elevation of-;the complete devices Fig;- 2 is, a sectional-view showingthe; arerangement of :the nnn ediate. hammer, actu.

ut smses- Fig.-3lis a top plan view of the apparatus.

Fig. 1. is an enlarged sectional detail view of a portion ofthe shifting mechanism. Referring more specifically to thedraw ings in which like characters of reference are used'to indicate like parts in the several views, the numeral 1 designates a rectangular, open topped casing the side walls of which. support a transverse shaft 2 upon: which is rotatably mounteda wheel 3 having; a toothed portion 4, a friction wheel engaging-portion 5, and a cut-out portion 6. The shaft is shiftably mounted at either end: in; the horizontal slots 7 of said side walls. 1

A shaft SiisrQtatably mounted in the side walls of the'casing and has fixedly mounted: thereon. a toothed gear 9 which is adapted to mesh with the toothed portion l of the wheel 3.

A shaft 10 is also revolublymounted in said sidewalls and carries afixedly'mounte'd friction-wheel 11. adaptedto engage with-the portion 5 of saidwheel 3.

A motor 12 is suspendedfrom the bottoml of the casing 1 by brackets 13 and is adapted? to drive the gear 9'by means of belting114: in the direction oflthe arrows, Figs. 1 and 2'. Acreversing power belting 15 engages pul+ leys 16 and 17 on shafts 8 and 10, respece tively, and, as is obvious will serve to. rotatethe latter shaft and the friction wheel 11' in a-clockwise direction.

In-the object striking movement of:ham+ mer 18 whose shaft19 is radially andfixedly" secured to the wheel 3, the wheel is adapted to be shifted into frictional engagement with. the revolving friction wheel 11 when the: latterwill serve torotatethe hammer supporting wheelin an'anti-clockwise direction and thereby to actuate the hammer to the: left, the movement of the hammer termi nating when itshead strikes the object orrthe; cushion .an anvil 20 in the end ofthe casing.

Toneflect; a retractive movement; of the hammerlthe wheel 3 is adapted' to.be'shiftedf into toothed engagement with the revolving wheel 9; whichuwill operateto reverse? the motion of a the former and, thereby toreturn. the hammer to its initial striking position; 100 substantially as illustrated-in; the drawings; Tp .-;ob vi ate; any dangers-oi furthm; positives retractive movement of the hammer carrying wheel 3 by the gear wheel 9, the wheel 3 is provided with the cut-out portion 6.

It is apparent that adequate means must be provided to reverse the hammer wheel when the hammer has reached its prescribed limit of movement in either direction. To this end I have provided both an automatic and a manually operable mechanism which may be employed selectively as the occasion may require.

To automatically shift the hammer carrying wheel shaft 2 in the slots 7, to right and left alternately, the shaft 8 has fixedly mounted at one end a sprocket wheel 21, while a sprocket-wheel 23 is rotatably mounted on the casing 1, the sprockets being geared together by 'a chain 24. By this arrangement the sprocket 23 will be caused to rotate in an anti-clockwise direction, as viewed in the drawings. A segmental camwheel 25, adapted to be rotated by the sprocket 23, has a cam-like portion 26. A pair of pivoted shifting levers 27 connect the shaft 2 with crank arms or a shaft 22, and a handle extension 28 of the latter has slidably mounted thereon by means of a collar 29, a slotted depending arm 30 which is under tension of a spring 31 attached to said handle extension and is adapted to engage for reciprocating movement the cam-wheel 25. A pin 32' projecting from the handle extension engages a slot 30 of said arm.

As long as the arm 30 is retained in the position shown in Fig. 1, by reason of its engagement with the circular periphery of the cam-wheel 25, the wheel 3 will be held, through the instrumentality of the shifting levers 27 in positive engagement with the retracting toothed gear wheel 9. But as the extremity of the arm 30 rides the cam portion of the wheel 25 the arm will be released for pivotal movement under the action of the spring 31, and in consequence the shaft 2 will be shifted in the slots 7 toward the right. disengaging the wheels 3 and 9 and drawing the wheel3 into frictional engagement with the friction-Wheel 11.

When it is desired to shift the wheel 3 by hand the arm 30 is slid out of engagement with the cam-wheel 25, and secured by a set-screw 33, the operator using the handle 28 to effect the desired engagement of the wheel 3. It is evident that the Wheel may be shifted into a neutral position out of engagement with either operating wheel 9 or 11. In this connection, it will be advantageous to provide a latch 39 or other device, for retaining the handle 28 in neutral position.

The entire operating mechanism is supported by the casing 1 which is mounted at one end, by hinges 32, upon beams 33 which in turn are adjustably supported by standards 34 upon runners 35. By means of hand-wheels 36, a cross-bar 37. and thread ed bolts 38, a tilting adjustment for the casing is provided. The entire casing may be elevated or lowered by means of the standards 3st having set-screws at. It is obvious that these adjustments are essential in the practical operation of the machine, providing, as they do, effective means for bringing the hammer in proper relation with the work. The runners provide convenient means for dragging the contrivance from one setting to another.

I claim 1. A machine of the character described, comprising a shiftable shaft, a hammer wheel mounted thereon, an impact element carried by the wheel, a rotatable gear wheel adapted to engage said hammer'wheel to rotate the same, and an additional gear wheel adapted to engage said hammer wheel to impart reverse rotation thereto.

2. A machine of the character described, comprising a shiftable shaft, a hammer wheel mounted thereon, an impact element carried by the wheel, a rotatable gear wheel adapted to engage said hammer carrying wheel to rotate the same in one direction of rotation, an additional gear wheel adapted to engage said hammer carrying wheel to rotate the same in an opposite or reverse direction of rotation from that induced by the first mentioned gear wheel. and means for manually shifting said shiftable shaft.

3. A machine of the character described, comprising a shiftable shaft, a hammer ca 1'- rying wheel mounted thereon, an impact element carried by the wheel, a rotatable gear wheel adapted to engage said hammer carrying wheel to rotate the same in one direction of rotation, an additional gear wheel adapted to engage said hammer carrying wheel to rotate the same in an opposite or reverse direction of rotation from that induced by the first mentioned gear wheel, and automatic shifting means for opera tively and alternately engaging said hammer carryingwheel with said gear wheels.

4. A machine of the character described, comprising a shiftably mounted shaft, a hammer carrying wheel rotatably mounted thereon, an impact element carried by the wheel and extending radially therefrom, a rotatable shaft, a gear wheel fixedly mounted thereon and adapted to engage said hammer carrying wheel to rotate the same in one direction, an additional rotatable shaft, a gear wheel fixedly mounted thereon and adaptedto engage said hammer carrying wheel to rotate the same in an opposite or reverse direction from that induced by the first mentioned gear wheel, pulleys mounted on said rotatable shafts, a transmission belting on said pulleys adapted'to rotate said wheels in opposite directions, driving means for said rotatable shafts, a rotatably mounted shaft provided portable stand, a casing having one end 10 with pivoted levers connecting the same to hingedly mounted on said stand the casing said shiftably mounted shaft, a revoluble serving to support the hammer, and threadcam-Wheel, and a spring tensioned arm cared adjusting elements adapted to elevate ried by the last mentioned rotatable shaft, and depress the opposite end of said casing said arm being adapted to engage said camto position said hammer. ,15 wheel. In testimony whereof I affix my signature.

5. An apparatus of the character described, comprising a machine hammer, a ALBERT HUNTER.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. G. 

